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  <section id="cmake-msvc-runtime-library">
<span id="variable:CMAKE_MSVC_RUNTIME_LIBRARY"></span><h1>CMAKE_MSVC_RUNTIME_LIBRARY<a class="headerlink" href="#cmake-msvc-runtime-library" title="Link to this heading">¶</a></h1>
<div class="versionadded">
<p><span class="versionmodified added">Added in version 3.15.</span></p>
</div>
<p>Select the MSVC runtime library for use by compilers targeting the MSVC ABI.
This variable is used to initialize the <span class="target" id="index-0-prop_tgt:MSVC_RUNTIME_LIBRARY"></span><a class="reference internal" href="../prop_tgt/MSVC_RUNTIME_LIBRARY.html#prop_tgt:MSVC_RUNTIME_LIBRARY" title="MSVC_RUNTIME_LIBRARY"><code class="xref cmake cmake-prop_tgt docutils literal notranslate"><span class="pre">MSVC_RUNTIME_LIBRARY</span></code></a>
property on all targets as they are created.  It is also propagated by
calls to the <span class="target" id="index-0-command:try_compile"></span><a class="reference internal" href="../command/try_compile.html#command:try_compile" title="try_compile"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">try_compile()</span></code></a> command into the test project.</p>
<p>The allowed values are:</p>
<dl class="simple">
<dt><code class="docutils literal notranslate"><span class="pre">MultiThreaded</span></code></dt><dd><p>Compile with <code class="docutils literal notranslate"><span class="pre">-MT</span></code> or equivalent flag(s) to use a multi-threaded
statically-linked runtime library.</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">MultiThreadedDLL</span></code></dt><dd><p>Compile with <code class="docutils literal notranslate"><span class="pre">-MD</span></code> or equivalent flag(s) to use a multi-threaded
dynamically-linked runtime library.</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">MultiThreadedDebug</span></code></dt><dd><p>Compile with <code class="docutils literal notranslate"><span class="pre">-MTd</span></code> or equivalent flag(s) to use a multi-threaded
statically-linked runtime library.</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">MultiThreadedDebugDLL</span></code></dt><dd><p>Compile with <code class="docutils literal notranslate"><span class="pre">-MDd</span></code> or equivalent flag(s) to use a multi-threaded
dynamically-linked runtime library.</p>
</dd>
</dl>
<p>The value is ignored on compilers not targeting the MSVC ABI, but an
unsupported value will be rejected as an error when using a compiler
targeting the MSVC ABI.</p>
<p>The value may also be the empty string (<code class="docutils literal notranslate"><span class="pre">&quot;&quot;</span></code>) in which case no runtime
library selection flag will be added explicitly by CMake.  Note that with
<a class="reference internal" href="../manual/cmake-generators.7.html#visual-studio-generators"><span class="std std-ref">Visual Studio Generators</span></a> the native build system may choose to
add its own default runtime library selection flag.</p>
<p>Use <span class="target" id="index-0-manual:cmake-generator-expressions(7)"></span><a class="reference internal" href="../manual/cmake-generator-expressions.7.html#manual:cmake-generator-expressions(7)" title="cmake-generator-expressions(7)"><code class="xref cmake cmake-manual docutils literal notranslate"><span class="pre">generator</span> <span class="pre">expressions</span></code></a> to
support per-configuration specification.  For example, the code:</p>
<div class="highlight-cmake notranslate"><div class="highlight"><pre><span></span><span class="nf">set(</span><span class="no">CMAKE_MSVC_RUNTIME_LIBRARY</span><span class="w"> </span><span class="s">&quot;MultiThreaded$&lt;$&lt;CONFIG:Debug&gt;:Debug&gt;&quot;</span><span class="nf">)</span>
</pre></div>
</div>
<p>selects for all following targets a multi-threaded statically-linked runtime
library with or without debug information depending on the configuration.</p>
<p>If this variable is not set then the <span class="target" id="index-1-prop_tgt:MSVC_RUNTIME_LIBRARY"></span><a class="reference internal" href="../prop_tgt/MSVC_RUNTIME_LIBRARY.html#prop_tgt:MSVC_RUNTIME_LIBRARY" title="MSVC_RUNTIME_LIBRARY"><code class="xref cmake cmake-prop_tgt docutils literal notranslate"><span class="pre">MSVC_RUNTIME_LIBRARY</span></code></a> target
property will not be set automatically.  If that property is not set then
CMake uses the default value <code class="docutils literal notranslate"><span class="pre">MultiThreaded$&lt;$&lt;CONFIG:Debug&gt;:Debug&gt;DLL</span></code>
to select a MSVC runtime library.</p>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>This variable has effect only when policy <span class="target" id="index-0-policy:CMP0091"></span><a class="reference internal" href="../policy/CMP0091.html#policy:CMP0091" title="CMP0091"><code class="xref cmake cmake-policy docutils literal notranslate"><span class="pre">CMP0091</span></code></a> is set to <code class="docutils literal notranslate"><span class="pre">NEW</span></code>
prior to the first <span class="target" id="index-0-command:project"></span><a class="reference internal" href="../command/project.html#command:project" title="project"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">project()</span></code></a> or <span class="target" id="index-0-command:enable_language"></span><a class="reference internal" href="../command/enable_language.html#command:enable_language" title="enable_language"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">enable_language()</span></code></a> command
that enables a language using a compiler targeting the MSVC ABI.</p>
</div>
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